maybe? ( object -- ? ) - Factor Documentation

Vocabulary
classes.maybe

Inputs and outputs

object	an object
?	a boolean

Word description
Tests if the object is an instance of the maybe class.

Definition

USING: classes.tuple.private kernel slots.private ;

IN: classes.maybe

: maybe? ( object -- ? )
    dup tuple? [ layout-of 7 slot \ maybe eq? ] [ drop f ] if ;